Question 1

Technician A says one wrench is sufficient when loosening a flare-nut. Technician B says embossed steel gaskets should be installed with the embossed side toward the block. Who is right?

Accepted Answer

Both statements are incorrect. When loosening a flare-nut, two wrenches are required to prevent the tubing from twisting or bending. Embossed steel gaskets should be installed with the embossed side facing away from the block to provide a better seal.

Question 2

Technician A says that a harmonic balancer repair sleeve kit will repair a worn damper hub at minimal cost. Technician B says this type sleeve is pressed onto the hub using a small amount of silicone sealer. Who is correct?

Accepted Answer

Technician A is correct. A harmonic balancer repair sleeve kit can repair a worn damper hub at minimal cost by installing a sleeve over the worn area. Technician B is incorrect as these sleeves are not pressed onto the hub using silicone sealer. The sleeve is often heated and then pushed onto the hub using an installation tool. The sleeve is designed to be a tight fit and does not require additional sealing.

Question 3

The recommended drill speed for 1/4" mild steel is 750 rpm.

Accepted Answer

This is the recommended drill speed for 1/4" mild steel according to industry standards.

Question 4

Technician A says spark plugs that have tapered seats require no gasket. Technician B says spark plugs that have flat seats require gaskets. Who is correct?

Accepted Answer

Technician A is correct because tapered seat spark plugs seal directly in the cylinder head and do not require a gasket. Technician B is correct because flat seat spark plugs require a gasket to seal properly. Therefore, both technicians are correct.

Question 5

Technician A says copper head gaskets are available for use in corrosive environments. Technician B says Teflon coated gaskets require the use of gasket sealer. Who is right?

Accepted Answer

Copper head gaskets are available for use in corrosive environments as they are more resistant to corrosion than other materials. Technician B is not correct as Teflon coated gaskets do not require the use of gasket sealer.

Question 6

All of the following are types of thread inserts used in engine repairs, EXCEPT _____.

Accepted Answer

Solid, Keensert, and heli-coil are all types of thread inserts used in engine repairs, but Smartsert is not.

Question 7

Technician A says chevron seals are used at the front and rear of the crankcase. Technician B says dynamic seals are used to seal moving parts. Who is right?

Accepted Answer

The answer of Technician A says chevron seals are used...

Question 8

Technician A says the click-type torque wrench is best because it is the most accurate. Technician B says that an inch-pound torque wrench should be used when measuring smaller torque values. Who is correct?

Accepted Answer

Technician B is correct because an inch-pound torque wrench is indeed used for smaller torque values, offering the precision needed for delicate applications. Technician A's statement about the click-type torque wrench being the best due to its accuracy is subjective and not necessarily true, as accuracy depends on the calibration and use of the wrench, not the type.

Question 9

Technician A says recommendations specify valve cover gaskets be tightened to 5 to 15 foot-pounds. Technician B says many gaskets used in the automotive industry are directional. Who is correct?

Accepted Answer

Technician A is correct because valve cover gaskets need to be tightened to a specific torque value, usually between 5 to 15 foot-pounds, as specified in the manufacturer's recommendations. 
Technician B is also correct because some gaskets used in the automotive industry are directional, meaning they need to be installed in a specific orientation to prevent leakage or other issues.

Question 10

To anneal a metal, it is heated and cooled rapidly.

Accepted Answer

Annealing involves heating a metal to a specific temperature and then cooling it slowly, usually in a furnace, to make it more ductile and reduce its hardness.

Question 11

Used only on precision machine parts, a(n) ____ sealer hardens in the absence of air.

Accepted Answer

The answer of Used only on precision machine parts, a(n)...

Question 12

Why should silicone application be avoided around fuel and automatic transmission fluid?

Accepted Answer

The answer of Why should silicone application be avoided around...

Question 13

Drill bits for iron and steel are properly ground to a _____ degree angle.

Accepted Answer

The answer of Drill bits for iron and steel are...

Question 14

A heli-coil is a thread repair device.

Accepted Answer

A heli-coil is used to repair stripped or damaged threads, creating a stronger thread in the original material.

Question 15

ISO flares and SAE double flares are interchangeable.

Accepted Answer

ISO flares and SAE double flares are not interchangeable because they have different angles and applications, with ISO flares typically being 90 degrees and used in European/Asian vehicles, and SAE double flares being 45 degrees and commonly used in American vehicles.

Question 16

Technician A says some manufacturers recommend head bolts going into a coolant passage be sealed with liquid thread sealant. Technician B says RTV stands for right torque value. Who is correct?

Accepted Answer

Some manufacturers do recommend using a liquid thread sealant on head bolts that go into a coolant passage, so Technician A is correct. However, RTV stands for "Room Temperature Vulcanizing," not "Right Torque Value," so Technician B is incorrect.

Question 17

Standard inch bolts have lines on the heads to identify the grade.

Accepted Answer

The number of lines on the head of a standard inch bolt indicates the bolt's grade, which corresponds to its material strength and intended use.

Question 18

Technician A says multi-layered steel gaskets have from eight to ten layers. Technician B says when drilling steel, you use a cutting oil. Who is right?

Accepted Answer

Technician B is correct because using cutting oil when drilling steel helps to cool and lubricate the drill bit, making the drilling process easier and prolonging the life of the drill bit. Multi-layered steel gaskets typically do not have as many as eight to ten layers; they usually have fewer layers.

Quiz 15: Engine Hardware: Fasteners, Thread Repair, and Gaskets